Influence of ecologically friendly cores on surface quality of castings based on magnesium alloys

摘要

Constructional materials as Al - alloys can be replaced by other materials with high strength to low mass densityratio, e.g. Mg-alloys. In order to pre-casting of holes and cavities cores based on pure inorganic salt can be applieddue to easy cleaning of even geometrically complex pre-cast holes. This technology is applied mainly for gravity andlow-pressure casting technology. This contribution is aimed at studying of mutual interaction of the Mg-alloy andthe salt core. Experiments were focused on surface quality; macro- and microstructure of testing casting samplesdetermination. Metallographic analysis and scanning electron microscope (SEM) with X-ray energy-dispersion superficialand spot microanalysis (EDAX) were employed.